package com.bjc.netty.c1;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.string.StringDecoder;

/**
 * @program: nettypro
 * @description:
 * @author: bjc
 * @create: 2021-09-21 20:58
 */
public class HelloServer {

    public static void main(String[] args) {
        //1.启动器 负责组装netty组件，启动服务器
        new ServerBootstrap()
                //2.BossEventLoop WorkerEventLoop(selector,thread) group组
                .group(new NioEventLoopGroup())
                //3. 选择服务器的ServerSocketChannel实现
                .channel(NioServerSocketChannel.class)
                //4.boss 负责处理连接worker（child） 负责吃力读写 决定了worker(child)
                //能执行那些操作（handler）
                .childHandler(
                        //5.channel 代表和客户端进行数据读写的通道 Initializer初始化，负责添加别的handler
                        new ChannelInitializer<NioSocketChannel>() {
                    @Override
                    protected void initChannel(NioSocketChannel ch) throws Exception {
                        //6.添加具体的handler   StringDecoder 将ByteBuf转化为字符串
                        ch.pipeline().addLast(new StringDecoder());
                        //自定义handler
                        ch.pipeline().addLast(new ChannelInboundHandlerAdapter(){
                            //读事件
                            @Override
                            public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
                                System.out.println(msg);
                            }
                        });
                    }
                    //7.绑定监听端口
                }).bind(8080);
    }
}
